Home / 81,333.25-121,695.41-77,061.44

Finding the Fourth Proportional to 81,333.25, 121,695.41 and 77,061.44

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Solution

The fourth proportional to 81,333.25, 121,695.41 and 77,061.44 is: 115,303.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,333.25 : 121,695.41 = 77,061.44 : x
  2. Step 2: Convert to fraction form
    81,333.25/121,695.41 = 77,061.44/x
  3. Step 3: Cross multiply
    81,333.25x = 121,695.41 × 77,061.44
  4. Step 4: Simplify right side
    81,333.25x = 9,378,024,032.88
  5. Step 5: Solve for x
    x = 9,378,024,032.88/81,333.25
  6. Step 6: Final answer
    x = 115,303.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.